1. A. Maréchal et M. Françon: Diffraction–Structure des Images (La Revue d’Optique Théorique et Instrumentale, Paris, 1960) Chap. 6, p. 71 (in French).
2. M. Born and E. Wolf: Principles of Optics (Pergamon Press, Oxford, 1980) 6th ed., p. 424.
3. F. A. Jenkins and H. E. White: Fundamentals of Optics (McGraw-Hill, New York, 1981) 4th ed., p. 602.
4. K. Yamamoto and A. Taira: J. Microscopy 129 (1983) 49.
5. Y. Hiramoto, S. Shimoda and Y. Shoji: Develop., Growth and Differ. 21 (1979) 141.